Recent research reveals that a magma "lid" deep beneath Yellowstone National Park is likely the reason the supervolcano has not erupted in millions of years. The study, published in Nature, indicates that this volatile-rich cap, located around 2.36 miles below the surface, is trapping heat and pressure. Using a vibroseis truck, researchers mapped the area and discovered significant irregularities in the upper magma boundary, suggesting that gases are being held back by the presence of partially molten rock. This finding raises concerns over the potential devastation should the supervolcano erupt again.
"For decades, we've known there's magma beneath Yellowstone, but the exact depth and structure of its upper boundary has been a big question. What we've found is that this reservoir hasn't shut down - it's been sitting there for a couple million years, but it's still dynamic."
"Seeing such a strong reflector at that depth was a surprise. It tells us that something physically distinct is happening there - likely a buildup of partially molten rock interspersed with gas bubbles."
"The exact depth and structure of its upper boundary has been a big question.... it's still dynamic."
"The obstruction may be what's preventing the volcanic system from erupting - a blast that's happened several times previously in the history of our planet."
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